Question

有人能举例说明使用CouchRest在CouchDB中存储独立附件吗？

这适用于非Rails项目。所以不涉及CouchRest :: Model的东西会很好。

感谢，马诺

Answer 1

看起来CouchRest github UsageOverview wiki page在“附件”部分中有一些基本示例：

contents = "<html><body>If you're happy and you know it, clap your hands.</body></html>"
@db.put_attachment(doc, "happy.html", contents, :content_type => "text/html")
# => {"ok"=>true, "id"=>"e0d70033da0fad3707fed320bd7e0770", "rev"=>"2-20635570c75e8b20f7a73fd1538f318d"}

# NOTE: The document is not updated automatically with the attachment information
pp doc.to_hash
# {"_id"=>"e0d70033da0fad3707fed320bd7e0770",
#  "_rev"=>"1-cbb61d1f90f7c01b273737702265b6c8",
#  "key"=>"value",
#  "another key"=>"another value"}

# If you try to fetch the attachment without getting the new state of the document, you will fail

@db.fetch_attachment(doc, "happy.html")
# => RestClient::ResourceNotFound: 404 Resource Not Found: {"error":"not_found","reason":"Document is missing attachment"}

doc = @db.get(doc["_id"])

pp doc.to_hash
# {"_id"=>"e0d70033da0fad3707fed320bd7e0770",
#  "_rev"=>"2-20635570c75e8b20f7a73fd1538f318d",
#  "key"=>"value",
#  "another key"=>"another value",
#  "_attachments"=>
#   {"happy.html"=>
#     {"content_type"=>"text/html",
#      "revpos"=>2,
#      "digest"=>"md5-q3MreM1aJgfSLHGrJLdg4g==",
#      "length"=>75,
#      "stub"=>true}}}

@db.fetch_attachment(doc, "happy.html")
=> "<html><body>If you're happy and you know it, clap your hands.</body></html>"

有关更多示例（包括删除附件），请参阅本页的其余部分。

使用CouchRest的独立附件

1 个答案: